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Singapore, 15 December 2020 – The weather in the second fortnight of December 2020 is forecast to be less wet compared to the first fortnight of the month. During the coming fortnight, the prevailing Northeast Monsoon conditions are expected to persist and the low-level winds over Singapore are forecast to continue blowing from the northwest or northeast.

2       In the second fortnight of December 2020, the north-easterly winds over the South China Sea and Singapore are forecast to weaken. During this period, short-duration thundery showers due to strong day-time heating of land areas coupled with localised convergence of winds in the surrounding vicinity, are expected over parts of the island in the afternoon on most days. The showers may extend into the evening on a few days. Also in the fortnight, a brief strengthening of northerly winds can be expected. This could bring windy conditions with occasional showers on one or two days. Overall, the rainfall for December 2020 is expected to be below average over most parts of the island.

3      In the coming fortnight, the daily temperature on most days is forecast to range between 24°C and 33°C. Warm conditions with maximum day-time temperatures of around 34°C in the afternoon can be expected on days when there is little or no rainfall.

4      For updates of the daily weather forecast, please visit our MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the MSS’ Weather@SG app, and/or the myENV app.

REVIEW (1 – 14 December 2020)

5      Northeast Monsoon conditions prevailed in the first half of December 2020 with low-level winds blowing from the northwest or northeast on most days.

6      During the first two weeks of December 2020, strong solar heating of land areas coupled with localised convergence of winds brought short-duration moderate to heavy thundery showers over the island on most days. The showers fell mostly in the afternoon, and on few days, extended into the evening. The heavy thundery showers that fell over many areas of the island on 14 December 2020 recorded a daily total rainfall of 94.0mm at Choa Chu Kang. This was the highest total rainfall in a day for the first half of December 2020.

7      In the first half of December 2020, the daily temperature ranged between 22.4°C and 34.4°C. The highest daily maximum temperature recorded was 34.4°C on 8 December 2020 at Paya Lebar. The daily minimum temperature on most days ranged between 23°C and 24°C, and the lowest minimum temperature recorded during the period was 22.4°C on 11 December 2020 at Sembawang.

8      About half of the island recorded below average rainfall in the first half of December 2020. The highest anomaly of 56% below average was recorded at Admiralty. The rainfall recorded at Pasir Ris was 55% above average.

CLIMATE STATION STATISTICS

Long-term Statistics for December
(Climatological reference period: 1981 – 2010)

Historical Extremes for December
(Rainfall since 1869 and temperature since 1929)

Singapore, 1 December 2020 – The prevailing Northeast Monsoon conditions in the region are expected to persist over the next few months. During the period, the low-level winds are forecast to blow from the northwest or northeast.

2     Climatologically, December is the wettest month of the year. In the first fortnight of December 2020, with the monsoon rain band forecast to lie close to the equator, more showers can be expected over Singapore and the surrounding region. Short-duration moderate to heavy thundery showers are forecast over parts of the island in the afternoon on most days. These showers may extend into the evening on a few occasions. On a few days, the thundery showers could be intense and widespread due to large-scale convergence of winds over Singapore and the surrounding vicinity. A strengthening of the north-easterly winds can be expected in the latter half of the fortnight. This is forecast to bring occasionally windy conditions on some days. The rainfall for the first fortnight of December 2020 is expected to be near-normal over most parts of Singapore.

3      In the coming fortnight, the daily temperature is forecast to range between 24°C and 33°C on most days, and may reach 34°C on one or two days. On a few rainy days, daily lows of around 22°C can be expected.

4      For updates of the daily weather forecast, please visit our MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the MSS’ Weather@SG app, and/or the myENV app.

REVIEW (1 – 30 November 2020)

5      Inter-monsoon conditions prevailed for most parts of November 2020 where the prevailing winds were generally light and variable in direction. A change in low-level winds to blow from the northwest or northeast in the last week of November 2020 signalled the cessation of the inter-monsoon period and the start of the Northeast Monsoon season.

6      Singapore experienced generally wet conditions in November 2020. The thundery showers fell in the afternoon on most days and on a few occasions extended into the night. On a few of these days, the thundery showers were intense and widespread. The wet weather can be attributed to strong solar heating of land areas coupled with large scale convergence of winds over Singapore and the surrounding vicinity. On 2 November 2020, intense thundery showers fell over many parts of the island. The daily total rainfall recorded that day was 134.2mm at Paya Lebar. This was the highest total rainfall in a day for November 2020.

7      While the prevailing La Niña conditions may have an influence on the rainfall in November 2020, other sources of variability such as monsoonal and local wind conditions play a more dominant role in modulating the weather conditions on a day-to-day basis.

8      There were a few warm days in November 2020, mainly in the first fortnight of the month. The highest daily maximum temperature of 34.9°C was recorded at Clementi and Paya Lebar on 5 and 12 November 2020 respectively. In the second fortnight of November 2020, rainy weather and cloudy skies brought cooler temperatures. The lowest daily minimum temperature of 22.3°C was recorded at Pulau Ubin on 28 November 2020. At the climate station in Changi, November 2020 recorded a monthly mean temperature of 27.2°C, making November 2020 the second coolest November in the past 10 years.

9    In November 2020, rainfall was above average over most parts of the island. The highest anomaly of 78% above average was recorded at Paya Lebar. The rainfall anomaly was lowest at Queenstown at 19% below average.

CLIMATE STATION STATISTICS

Long-term Statistics for December
(Climatological reference period: 1981 – 2010)

Historical Extremes for December
(Rainfall since 1869 and temperature since 1929)

Singapore, 16 November 2020 – Inter-monsoon conditions with low level winds that are light and variable in direction have been prevailing over Singapore since the start of November 2020. In the second half of November 2020, the low-level winds are forecast to gradually strengthen and shift to blow from the northeast or northwest around the end of the month. This change in monsoonal winds signal the start of the Northeast Monsoon season, and is expected to extend into March 2021.

2      With the monsoon rain band forecast to continue to lie over the equatorial Southeast Asia region for the rest of the month, the second half of November 2020 is expected to be as wet as the first half of the month. During this period, short-duration moderate to heavy thundery showers are expected over parts of the island in the afternoon on most days. There could be a few days where the showers may extend into the evening. On one or two days where the winds are forecast to blow from the southwest or west, the passage of Sumatra squalls is expected to bring widespread thundery showers and gusty winds over the island between the predawn and early morning. The rainfall for November 2020 is likely to be above average over most parts of Singapore.

3      The daily temperature on most days in the second fortnight of November 2020 is forecast to range between 24°C and 34°C. Although showers are expected on most days of the fortnight, the daily maximum temperature could still reach a high of around 35°C on one or two days.

4       For updates of the daily weather and haze situation, please visit the MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app, MSS’ Weather@SG app, and the haze microsite (www.haze.gov.sg).

REVIEW (1 – 15 November 2020)

5     In the first fortnight of November 2020, inter-monsoon conditions prevailed over Singapore, and the monsoon rain band was located over the equatorial South China Sea region.

6     During the first half of November 2020, with winds that were light and variable in direction and strong solar heating of land areas, moderate to heavy thundery showers fell over the island on many days. On 2 Nov 2020, flash floods were reported over several areas in the afternoon following a heavy downpour over many parts of the island. The intense thundery showers that day was a result of strong solar heating of land areas coupled with convergence of winds over Singapore and the surrounding vicinity. The highest daily rainfall recorded on 2 November 2020 was 134.2mm at Paya Lebar. This was the highest total rainfall in a day for the first half of November 2020.

7      In the first two weeks of November 2020, despite the wet conditions, there were a few warm days where the daily maximum temperature exceeded 34°C. During the period, the daily temperature ranged between 22.5°C and 34.9°C. The highest daily maximum temperature of 34.9°C was recorded on 5 and 12 November 2020 at Clementi and Paya Lebar respectively. The daily minimum temperature on most days ranged between 23°C and 24°C, and the lowest daily minimum temperature of 22.5°C was recorded on 2 November 2020 at Newton.

8     Most parts of the island received average to above-average rainfall in the first half of November 2020. The highest anomaly of 114% above average was recorded at Paya Lebar. The anomaly was lowest at Jurong at 40% below average.

CLIMATE STATION STATISTICS

Long-term Statistics for November
(Climatological reference period: 1981 – 2010)

Historical Extremes for November
(Rainfall since 1869 and temperature since 1929)

Singapore, 2 November 2020 – The prevailing Southwest Monsoon conditions are expected to weaken and gradually transition to inter-monsoon conditions in the first half of November 2020. During this period, the low-level winds over the equatorial Southeast Asia region including Singapore are forecast to become light and variable in direction.

2        The inter-monsoon conditions are forecast to last through November 2020. During the inter-monsoon period, the monsoon rain band lies close to the equatorial region, and more showers can be expected over Singapore and the surrounding vicinity. The period is characterised by warm weather and thunderstorms that can at times be intense. During the inter-monsoon months, lightning activity tends to be higher than other months of the year.

3         In the first fortnight of November 2020, short-duration moderate to heavy thundery showers with frequent lightning are expected over parts of the island between the afternoon and evening on most days. On some days, the presence of low-pressure systems over the South China Sea may bring a shift in the low-level winds to blow from the southwest or west. This could induce the development of Sumatra squalls in the Strait of Malacca and bring widespread thundery showers with gusty winds on several mornings. Overall, the rainfall for November 2020 is expected to be near-normal over most parts of Singapore.

4         The warm conditions experienced in the last fortnight of October 2020 is forecast to persist into the first fortnight of November 2020. The daily temperature is expected to range between 24°C and 34°C on most days and could soar to a scorching 35°C on one or two days.

5         For updates of the daily weather and haze situation, please visit the MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app, MSS’ Weather@SG app, and the haze microsite (www.haze.gov.sg).

REVIEW (1 – 31 October 2020)

6      In October 2020, Southwest Monsoon conditions prevailed over Singapore and the surrounding region. The low-level winds blew from the south or west on most days and were light and variable in direction on a few days.

7     During the month, the influence of several tropical storms over the South China Sea and Western Pacific Ocean resulted in large-scale convergence of winds over Singapore and the surrounding vicinity. This led to the passage of Sumatra squalls that brought widespread showers and gusty winds over Singapore between the pre-dawn hours and morning on most days. Thundery showers also fell over the island on a few nights. On 2 October 2020, heavy thundery showers fell over the western part of Singapore during the night. A daily total rainfall of 108.2 mm was recorded at Tuas that day. This was the highest rainfall recorded in a day in October 2020.

8      The Sumatra squalls brought cloudy and cool conditions on some days in October 2020. There were more warm days in the second half of October 2020 than in the first half of the month. The highest daily maximum temperature recorded in October 2020 was 34.8°C at Pulau Ubin and Admiralty on 5 and 17 October 2020 respectively. The lowest daily minimum temperature recorded in October 2020 was 22.2°C recorded at Changi on 25 October 2020.

9     In October 2020, rainfall was below average over most parts of the island. Choa Chu Kang recorded the highest rainfall anomaly of 28% above average, while Changi recorded rainfall anomaly of 48% below average.

CLIMATE STATION STATISTICS

Long-term Statistics for November
(Climatological reference period: 1981 – 2010)

Historical Extremes for November
(Rainfall since 1869 and temperature since 1929)

Singapore, 16 October 2020 – In the second fortnight of October 2020, the monsoon rain band is forecast to lie over the northern Southeast Asia region. During the period, Singapore can expect dry and warm conditions, with daily highs of around 34°C on most days.

2        The prevailing Southwest Monsoon conditions with low-level winds blowing from the southeast or southwest are expected to persist in the second half of October 2020. With low-pressure systems expected to develop over the northern South China Sea, the low-level winds over Singapore and the surrounding vicinity are forecast to strengthen and blow from the west on some days.

3         During this fortnight, it is forecast to be dry and warm. However, localised short-duration moderate to heavy thundery showers can still be expected on some days over parts of the island between the late morning and afternoon. In addition, Sumatra squalls are forecast to bring thundery showers and gusty winds on some days between the predawn hours and morning. Overall, the rainfall for October 2020 is forecast to be below normal over most parts of Singapore.

4         Warm conditions are expected on most days for the rest of the month, and the daily temperature is forecast to range between 25°C and 34°C. The daily maximum temperature could reach close to 35°C on a few days, particularly when there are few clouds in the sky.

5         For updates of the daily weather and haze situation, please visit the MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app, MSS’ Weather@SG app, and the haze microsite (www.haze.gov.sg).

REVIEW (1 – 15 October 2020)

6      In the first half of October 2020, Southwest Monsoon conditions prevailed over Singapore and the surrounding region. During the period, the low-level winds blew from the southeast or southwest. There were some days when the winds over Singapore and the surrounding region strengthened to blow from the west due to the presence of tropical storms over the South China Sea and the northwestern Pacific Ocean.

7     The influence of these tropical storms resulted in large-scale wind convergence over Singapore and the surrounding vicinity. Widespread moderate to heavy thundery showers fell over the island on several days, mostly between the night and predawn hours. The showers were due to the passage of Sumatra squalls from the Strait of Malacca over Singapore. The showers were heaviest on 2 October 2020, and the daily total rainfall recorded that day was 108.2mm at Tuas. This was the highest rainfall recorded in a day for the first fortnight of October 2020.

8      During the fortnight, the occurrence of these Sumatra squalls brought cloudy and cool conditions on most days. The daily maximum temperature across the island was below 34°C on all days except on 5 October 2020. The maximum temperature recorded that day was 34.8°C at Pulau Ubin. The lowest daily minimum temperature recorded in the fortnight was 22.6°C at Clementi on 3 October 2020.

9     In the first half of October 2020, rainfall was above average over the western part of the island, while for the rest of the island, rainfall was below average. Choa Chu Kang recorded the highest rainfall anomaly of 87% above average, while MacRitchie in the central part of Singapore recorded the highest rainfall anomaly of 57% below average.

CLIMATE STATION STATISTICS

Long-term Statistics for October
(Climatological reference period: 1981 – 2010)

Historical Extremes for October
(Rainfall since 1869 and temperature since 1929)

Singapore, 1 October 2020 – According to the Meteorological Service Singapore, more thundery showers are expected in the first fortnight of October 2020. During the period, the daily temperature is forecast to range between 24°C and 33°C on most days, with lows of around 22°C on a few days.

2        The prevailing Southwest Monsoon conditions are expected to persist in the two weeks ahead. During the period, the low-level winds are forecast to continue blowing from the southeast or southwest and may strengthen to blow from the southwest or west in the latter part of the fortnight under the influence of developing low pressure systems over the South China Sea.

3          In the first fortnight of October 2020, with the monsoon rain band forecast to lie closer to the equatorial Southeast Asia region, more rain can be expected over Singapore. During the period, short-duration moderate to heavy thundery showers are forecast between the late morning and afternoon on some days due to strong solar heating of land areas. On a few of these days, the showers could continue into the evening over some parts of the island. In the latter half of the fortnight, strong convergence of winds in the surrounding vicinity and the passage of Sumatra squalls are expected to bring widespread moderate to heavy thundery showers with occasional gusty winds between the predawn hours and morning on several days. In addition, thundery showers can be expected on a few nights. The rainfall for the first fortnight of October 2020 is forecast to be above average over most parts of the island.

4          For the next two weeks, the daily temperature is forecast to range between 24°C and 33°C on most days. On one or two days, the daily maximum temperature could rise to around 34°C. On a few rainy days, daily lows of around 22°C can be expected.

5         For updates of the daily weather and haze situation, please visit the MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app, MSS’ Weather@SG app, and the haze microsite (www.haze.gov.sg).

REVIEW (1 – 30 September 2020)

6      Southwest Monsoon conditions prevailed over the region in September 2020. The low-level winds blew from the southeast or southwest on most days, and from the east or west on a few days.

7      September 2020 was relatively wet and occasionally windy. Thundery showers fell over the island in the late morning and afternoon on most days, and on a few days, the rain continued into the evening. Under the influence of large-scale convergence of winds over Singapore and the surrounding vicinity, moderate to heavy thundery showers fell over the island on several nights. On the morning of 10 September 2020, heavy thundery showers fell over the western part of Singapore. The total daily rainfall recorded that day was 129.6mm at Tuas South, which is the highest total rainfall recorded in a day for September 2020.

8       The wet and cloudy conditions brought cooler temperatures on some days around mid-September 2020. The lowest daily maximum temperature in September 2020 was 28.3°C recorded at East Coast and Sembawang on 5 and 13 September 2020 respectively. Both days were associated with island-wide thundery showers that fell throughout most parts of the day. The lowest daily minimum temperature in September 2020 was 20.9°C recorded at Newton on 16 September 2020, associated with a Sumatra squall that brought heavy thundery showers and gusty winds over the island in the early hours of the morning. The last time that the temperature dipped below 21.0 °C was on 8 May 2019 when a minimum temperature of 20.8 °C was recorded.

9       There were a few warm days in September 2020 with daily maximum temperatures reaching around 34.0°C. On 22 September 2020, with relatively clear skies and presence of high-level clouds, a halo formed by the refraction of light through ice crystals in the high clouds was spotted encircling the sun around noon.

10      With a monthly total rainfall of 150.2mm recorded at the Changi climate station, September 2020 is the second wettest September in the last 10 years after September 2013 (257mm). September 2020 is the coolest September in the last 10 years. It  ties with September 2013, with a monthly mean temperature of 27.5°C, 0.1°C lower than the long term September average.

11       Almost all parts of the island received well above-normal rainfall in September 2020. The highest anomaly of 121% above average was recorded at Jurong West. The anomaly was lowest at Changi at 1% below average.

CLIMATE STATION STATISTICS

Long-term Statistics for October
(Climatological reference period: 1981 – 2010)

Historical Extremes for October
(Rainfall since 1869 and temperature since 1929)

Singapore, 16 September 2020 – The weather for the second half of September 2020 is forecast to be less wet with a few warm days compared to the first fortnight of the month. The daily temperature is expected to range between 25°C and 33°C on most days and may reach a high of around 34°C on a few days.

2         In the coming fortnight, Southwest Monsoon conditions are expected to persist. The low-level winds are forecast to weaken but continue to blow from the southeast or southwest. The winds may shift to blow from the west on one or two days.

3          In the next two weeks, the monsoon rain band is forecast to remain over the equatorial Southeast Asia region. Short-duration moderate to heavy thundery showers can be expected over parts of the island between the late morning and afternoon on most days, and may extend into the evening on one or two days. The passage of Sumatra squalls may bring widespread thundery showers with occasional gusty winds in the morning on a few days. While rainfall in the coming fortnight is expected to be lower than that in the first fortnight of the month, the overall rainfall for September 2020 is expected to be well above-average over most parts of the island.

4          On most days in the coming fortnight, the daily temperature is forecast to range between 25°C and 33°C. A few warm days are expected with daily highs reaching around 34°C. Some nights can be relatively warm with night-time temperatures hovering around 28°C, particularly  when the prevailing southeast winds blow warm and humid air from the sea toward the land.

5         For updates of the daily weather and haze situation, please visit the MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app, MSS’ Weather@SG app, and the haze microsite (www.haze.gov.sg).

REVIEW (1 – 15 September 2020)

6        In the first fortnight of September 2020, Southwest Monsoon conditions prevailed over the region. During this period, the low-level winds blew from the southeast or southwest.

7       The first fortnight of September 2020 was wet and occasionally windy. Thundery showers fell between the late morning and afternoon on most days, and extended into the evening on a few of these days. There were also a few days where thundery showers fell during the night and in the early morning. The widespread moderate to heavy thundery showers with occasional gusty winds on some days were due to large-scale convergence of winds over Singapore and the surrounding vicinity. The showers were heaviest on the morning of 10 September 2020. The daily total rainfall recorded that day was 129.6mm at Tuas South, which is the highest recorded for the first fortnight of September 2020.

8        The wet weather in the first fortnight of September 2020 brought cooler conditions on some days, mostly in the latter half of the fortnight. The lowest daily maximum temperature  during the period was 28.3°C recorded at East Coast and at Sembawang on 5 and 13 September 2020 respectively. Both days were associated with island-wide heavy thundery showers and cloudy skies, and with minimum temperatures  between 22.0°C and 23.0°C. The lowest daily minimum temperature recorded during the first fortnight of September was 21.8°C at Paya Lebar on 15 September 2020.

9         Almost all parts of the island received well above-normal rainfall in the first half of September 2020. The highest anomaly of 188% above average was recorded at Tanjong Katong. The anomaly was lowest at Admiralty at 8% below average.

CLIMATE STATION STATISTICS

Long-term Statistics for September
(Climatological reference period: 1981 – 2010)

Historical Extremes for September
(Rainfall since 1869 and temperature since 1929)

Singapore, 1 September 2020 –  The weather in the first half of September 2020 is expected to be similar to that in the last fortnight of August 2020, with thundery showers and humid conditions forecast on most days. In the next fortnight, the daily maximum temperature is forecast to range between 32°C and 33°, and with daily highs of around 34°C on a few days. Toward the second week of September 2020, warm weather can be expected on some nights.

2          The prevailing Southwest Monsoon conditions in the region are forecast to persist in the first fortnight of September 2020. During the period, the low-level winds are expected to blow from the southeast or southwest, and may on brief occasions, blow from the west.

3          In the first fortnight of the month, the monsoon rain band is expected to lie close to the equatorial Southeast Asia region. For Singapore, short-duration moderate to heavy thundery showers are forecast over parts of the island between the late morning and afternoon on most days. In addition, widespread thundery showers with gusty winds due to the passage of Sumatra squalls are expected on one or two mornings. The total rainfall in the first fortnight of September 2020 is forecast to be above-average over most parts of the island.

4          Despite showers falling over the island on most days in the fortnight, it can still be warm on a few days where the daily maximum temperature could reach around 34°C. On most days, the daily temperature is forecast to range between 25°C and 33°C. Toward the second week of the month, the weather on some nights can be warm and humid with night-time temperatures around 28°C. This occurs when the prevailing southeast winds strengthen and blow warm, humid air from the sea over the land.

5         For updates of the daily weather and haze situation, please visit the MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app, MSS’ Weather@SG app, and the haze microsite (www.haze.gov.sg).

REVIEW (1 – 31 August 2020)

6         In August 2020, Southwest Monsoon conditions prevailed over the region with the low-level winds blowing from the southeast or southwest. Under the influence of a few tropical storms over the South China Sea and the northwestern Pacific Ocean, the prevailing winds strengthened and blew from the west on some days.

7          With the monsoon rain band situated over the equatorial region in the latter half of August 2020, more rain fell over Singapore in the second fortnight compared to the first fortnight of the month.  Moderate to heavy thundery showers due to strong solar heating of land areas fell over the island in the late morning and afternoon on most days and extended into the evening on a few days. There were a few mornings where the passage of Sumatra squalls brought widespread thundery showers with gusty winds to Singapore. On 13 August 2020, moderate to heavy thundery showers fell over the island in the morning. The daily total rainfall of 115.6mm recorded at Bedok South that day was the highest total rainfall recorded for the month.

8          In August 2020, there were several dry and warm days, mostly in the first half of the month, where the daily maximum temperature was above 34°C. The highest daily maximum temperature of 35.4°C was recorded at Admiralty on 9 August 2020.  There were also several nights that were warm with night-time temperatures above 28°C, particularly over the southern, eastern and western coastal areas of the island. More rain fell over the island in the second half of August 2020. During this period, it was relatively cooler compared to the first half of the month, and the daily maximum temperature was below 33°C on nine days. At the Changi climate station, the mean monthly temperature for August 2020 was 28.3°C, 0.4°C higher than the month’s long-term average.

9          About one-third of the island recorded above-normal rainfall in August 2020. The rainfall recorded over Jurong area was 54% above-average, while that recorded at Admiralty was 42% below average.

CLIMATE STATION STATISTICS

Long-term Statistics for September
(Climatological reference period: 1981 – 2010)

Historical Extremes for September
(Rainfall since 1869 and temperature since 1929)

Singapore, 14 August 2020 –  In the second fortnight of August 2020, more thundery showers are expected, following the drier weather in the first fortnight of the month. During this period, the daily maximum temperature is expected to range between 32°C and 33°, and with daily highs of around 34°C on a few days.

2          The prevailing Southwest Monsoon conditions are forecast to persist in the second half of August 2020. During this period, the low-level winds over Singapore and the surrounding vicinity are forecast to blow from the southeast or southwest. On a few days during the fortnight, the winds could blow from the east.

3          On most days over the next two weeks, short-duration moderate to heavy thundery showers can be expected between the late morning and afternoon, and could extend into the evening on a few days. Convergence of winds in the surrounding vicinity could bring thundery showers over the island on a few nights. In addition, widespread thundery showers with gusty winds due to the passage of Sumatra squalls are forecast on one or two mornings. Overall, more rainfall is expected in the second half of August 2020 compared to the first half of the month. The total rainfall for August 2020 is forecast to be near-average over most parts of the island.

4          While more showers are expected in the coming fortnight, there could still be a few warm days with daily highs of around 34°C. On most days, the daily temperature is forecast to range between 25°C and 33°C. Some nights can be relatively warm and humid when southeast winds bring warm, humid air from the sea toward the land. Night-time minimum temperatures of around 28°C can be expected on a few days.

5         For updates of the daily weather and haze situation, please visit the MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app, MSS’ Weather@SG app, and the haze microsite (www.haze.gov.sg).

REVIEW (1 – 13 August 2020)

6          In the first fortnight of August 2020, Southwest Monsoon conditions prevailed over Singapore and the surrounding region. During the period, the low-level winds blew from the southeast or southwest. There were some days when the winds over Singapore and the surrounding region strengthened to blow from the west due to the influence of a few tropical storms over the South China Sea and northwestern Pacific Ocean.

7          In the first fortnight of August 2020, the monsoon rain band was situated over the northern Southeast Asia region, resulting in drier weather over equatorial Southeast Asia including Singapore. There were however a few days where thundery showers fell over the island in the morning due to the passage of Sumatra squalls. The highest daily total rainfall of 115.6mm was recorded at Bedok South on 13 August 2020.

8          During the first half of August 2020, the daily maximum temperature was above 33°C on most days. There were a few dry and warm days where the daily maximum temperature exceeded 34°C. The highest daily maximum temperature of 35.4°C was recorded at Admiralty on 9 August 2020. On a few nights during the period, the daily minimum temperature over the southern, eastern and western coastal areas of the island were above 28°C.

9          Singapore received well below average rainfall over many parts of the island in the first fortnight of August 2020. The rainfall recorded at Sentosa Island was 84% below average while that recorded at Tanjong Katong was 32% above average.

CLIMATE STATION STATISTICS

Long-term Statistics for August
(Climatological reference period: 1981 – 2010)

Historical Extremes for August
(Rainfall since 1869 and temperature since 1929)

Singapore, 30 July 2020 – The first fortnight of August 2020 is forecast to be warm and less wet compared to July 2020. The daily maximum temperature is expected to range between 33°C and 34°C on most days, with highs of around 35°C on a few days. Warm and humid conditions are also expected on a few nights, with temperatures hovering around 28°C.

2          The prevailing Southwest Monsoon conditions are expected to persist into August 2020. In the first half of August 2020, the low-level winds are forecast to blow from the southeast or southwest. With the presence of low-pressure systems over the South China Sea in the first week of August 2020, the low-level winds over Singapore and the surrounding vicinity are forecast to strengthen and blow from the west on some days.

3          In the first fortnight of August 2020, the monsoon rain band is forecast to shift northward, away from the equatorial Southeast Asia region, bringing drier conditions to Singapore. During the fortnight, short-duration moderate to heavy thundery showers can be expected over parts of the island between the late morning and afternoon on some days due to solar heating of land areas. Widespread thundery showers with gusty winds due to Sumatra squalls are expected between the predawn hours and morning on two or three days. Rainfall for the first fortnight of August 2020 is forecast to be slightly below-normal over most parts of Singapore.

4          The first half of August 2020 is expected to be warmer than July 2020. On most days, the daily temperature is forecast to range between 25°C and 34°C, with highs of around 35°C on a few days. Warm and humid nights with temperatures of around 28°C can be expected on a few days when the prevailing southeasterly winds blow in warm air from the sea over land.

5         For updates of the daily weather and haze situation, please visit the MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app, MSS’ Weather@SG app, and the haze microsite (www.haze.gov.sg).

REVIEW (1 – 29 July 2020)

6          Southwest Monsoon conditions prevailed in July 2020. During the period, the low-level winds blew from the southwest or southeast, and from the west on some days.

7          During the month, the monsoon rain band remained over the equatorial Southeast Asia region, which brought thundery showers on many days to Singapore and the surrounding vicinity. Most of the thundery showers fell over the island between the late morning and early afternoon due to strong solar heating of land areas. On some of these days, the showers extended into the late afternoon. There were also thundery showers that fell on a few nights due to large-scale convergence of winds in the surrounding region. On 9 July 2020, thundery showers fell over many areas of the island. The daily total rainfall of 125.6mm recorded at Buona Vista that day was the highest daily total rainfall for July 2020.

8          In July 2020, the daily maximum temperatures at all stations across the island were below 33°C for more than half the month, and on nine of these days, the daily maximum temperature was below 32°C. The lowest daily maximum temperature of 25.9°C was recorded at Khatib on 13 July 2020, which was associated with island-wide thundery showers and overcast skies that day.

9          More than two thirds of the island received above average rainfall in July 2020. The rainfall recorded at Jurong was 86% above average while that recorded at Clementi was 24% below average.

CLIMATE STATION STATISTICS

Long-term Statistics for August
(Climatological reference period: 1981 – 2010)

Historical Extremes for August
(Rainfall since 1869 and temperature since 1929)